Hi,
On Sat, 29 Jul 2017 06:12:31 +0500 Sandro Cardelli <[email protected]> spammed:
> Received: from rptf.pisem.net (221.176.221.70 [221.176.221.70])
> by mx1.poolp.org (OpenSMTPD) with ESMTP id 7999980e
> for <[email protected]>;
> Sat, 29 Jul 2017 03:12:32 +0200 (CEST)
> From: "Sandro Cardelli" <[email protected]>
> To: "misc" <[email protected]>
> Subject: Re: have you heard the news?
> Date: Sat, 29 Jul 2017 06:12:31 +0500
> Message-ID: <[email protected]>
<hostmaster@palm:/tmp 0>$ host 221.176.221.70
Host 70.221.176.221.in-addr.arpa. not found: 3(NXDOMAIN)
Could client (r)DNS client hostname restrictions be built into OpenSMTPd?
This sort of spam is stopped dead by Postfix with these built in settings:
smtpd_helo_restrictions =
reject_invalid_helo_hostname
reject_non_fqdn_helo_hostname
reject_unknown_helo_hostname
smtpd_client_restrictions =
reject_unknown_client_hostname
smtpd_sender_restrictions =
reject_non_fqdn_sender
reject_unlisted_sender
reject_unknown_sender_domain
smtpd_recipient_restrictions =
reject_non_fqdn_recipient
reject_unlisted_recipient
reject_unknown_recipient_domain
Cheers!
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